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CVE-2026-45642: Microsoft Azure Attestation Service Spoofing via Physical Attack

CVE-2026-45642 · published 4 months ago

Summary

The Microsoft Azure Attestation Service and Device Health Attestation Service do not properly validate user input. This allows an attacker with physical access to the system to impersonate a legitimate user. To protect your system, ensure that physical access to the device is strictly controlled and consider implementing additional security measures.

What to do

Update microsoft windows_10_1607 to version 10.0.14393.9234 or later.
Update microsoft windows_10_1809 to version 10.0.17763.8880 or later.
Update microsoft windows_10_21h2 to version 10.0.19044.7417 or later.
Update microsoft windows_10_22h2 to version 10.0.19045.7417 or later.
Update microsoft windows_11_23h2 to version 10.0.22631.7219 or later.
Update microsoft windows_11_24h2 to version 10.0.26100.8655 or later.
Update microsoft windows_11_25h2 to version 10.0.26200.8655 or later.
Update microsoft windows_11_26h1 to version 10.0.28000.2269 or later.
Update microsoft windows_server_2016 to version 10.0.14393.9234 or later.
Update microsoft windows_server_2019 to version 10.0.17763.8880 or later.
Update microsoft windows_server_2022 to version 10.0.20348.5256 or later.
Update microsoft windows_server_2025 to version 10.0.26100.32995 or later.
Update microsoft windows 10 version 1607 to version 10.0.14393.9234 or later.
Update microsoft windows 10 version 1809 to version 10.0.17763.8880 or later.
Update microsoft windows 10 version 21h2 to version 10.0.19044.7417 or later.
Update microsoft windows 10 version 22h2 to version 10.0.19045.7417 or later.
Update microsoft windows 11 version 23h2 to version 10.0.22631.7219 or later.
Update microsoft windows 11 version 24h2 to version 10.0.26100.8655 or later.
Update microsoft windows 11 version 25h2 to version 10.0.26200.8655 or later.
Update microsoft windows 11 version 26h1 to version 10.0.28000.2269 or later.
Update microsoft windows server 2012 to version 6.2.9200.26132 or later.
Update microsoft windows server 2012 (server core installation) to version 6.2.9200.26132 or later.
Update microsoft windows server 2012 r2 to version 6.3.9600.23228 or later.
Update microsoft windows server 2012 r2 (server core installation) to version 6.3.9600.23228 or later.
Update microsoft windows server 2016 to version 10.0.14393.9234 or later.
Update microsoft windows server 2016 (server core installation) to version 10.0.14393.9234 or later.
Update microsoft windows server 2019 to version 10.0.17763.8880 or later.
Update microsoft windows server 2019 (server core installation) to version 10.0.17763.8880 or later.
Update microsoft windows server 2022 to version 10.0.20348.5256 or later.
Update microsoft windows server 2025 to version 10.0.26100.32995 or later.
Update microsoft windows server 2025 (server core installation) to version 10.0.26100.32995 or later.

Affected software

Vendor	Product	Affected versions
microsoft	windows_10_1607	< 10.0.14393.9234 `cpe:2.3:o:microsoft:windows_10_1607:::::::x64:*`
microsoft	windows_10_1809	< 10.0.17763.8880 `cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*`
microsoft	windows_10_21h2	< 10.0.19044.7417 `cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64:*`
microsoft	windows_10_22h2	< 10.0.19045.7417 `cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64:*`
microsoft	windows_11_23h2	< 10.0.22631.7219 `cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:*`
microsoft	windows_11_24h2	< 10.0.26100.8655 `cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*`
microsoft	windows_11_25h2	< 10.0.26200.8655 `cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:*`
microsoft	windows_11_26h1	< 10.0.28000.2269 `cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:*`
microsoft	windows_server_2012	r2 `cpe:2.3:o:microsoft:windows_server_2012:-:::::::*`
microsoft	windows_server_2016	< 10.0.14393.9234 `cpe:2.3:o:microsoft:windows_server_2016::::::::`
microsoft	windows_server_2019	< 10.0.17763.8880 `cpe:2.3:o:microsoft:windows_server_2019::::::::`
microsoft	windows_server_2022	< 10.0.20348.5256 `cpe:2.3:o:microsoft:windows_server_2022::::::::`
microsoft	windows_server_2025	< 10.0.26100.32995 `cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*`
microsoft	windows 10 version 1607	< 10.0.14393.9234
microsoft	windows 10 version 1809	< 10.0.17763.8880
microsoft	windows 10 version 21h2	< 10.0.19044.7417
microsoft	windows 10 version 22h2	< 10.0.19045.7417
microsoft	windows 11 version 23h2	< 10.0.22631.7219
microsoft	windows 11 version 24h2	< 10.0.26100.8655
microsoft	windows 11 version 25h2	< 10.0.26200.8655
microsoft	windows 11 version 26h1	< 10.0.28000.2269
microsoft	windows server 2012	< 6.2.9200.26132
microsoft	windows server 2012 (server core installation)	< 6.2.9200.26132
microsoft	windows server 2012 r2	< 6.3.9600.23228
microsoft	windows server 2012 r2 (server core installation)	< 6.3.9600.23228
microsoft	windows server 2016	< 10.0.14393.9234
microsoft	windows server 2016 (server core installation)	< 10.0.14393.9234
microsoft	windows server 2019	< 10.0.17763.8880
microsoft	windows server 2019 (server core installation)	< 10.0.17763.8880
microsoft	windows server 2022	< 10.0.20348.5256
microsoft	windows server 2025	< 10.0.26100.32995
microsoft	windows server 2025 (server core installation)	< 10.0.26100.32995

Original advisory text

Microsoft Azure Attestation service and Device Health Attestation Service Spoofing Vulnerability

Improper input validation in Microsoft Azure Attestation service and Device Health Attestation Service allows an authorized attacker to perform spoofing with a physical attack.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45642 Vendor Advisory

Fix within

Internet-facing 60 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker partial control

Severity

3.9 Low

Exploitation

<1% chance of attack within 30 days

Type

CWE-20Improper Input Validation

Timeline

Published9 Jun 2026

Updated31 Oct 2026

First seen11 Jun 2026

Sources

CVE-2026-45642 · NVD

CVE-2026-45642 · MITRE

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